Box-making machine



March 2 S. R. HOWARD BOX MAKING MACHINE Filed August 20, 1925 2 Sheets-Sheet l kuwN .Zizuemto r March 2 1926.

1,575,485 W. HEQWJARD BOX MAKING MACHINE Filed August 20, 1925 2 Sheets-Sheet 2 Italy? i Z??? 11% wgziza g? fi Patented Mar. 2, 1926.

UNITED STATES PATENT OFFICE.

STANLEY R. HOWARD, OFEAST MILTON, MASSACHUSETTS, ASSIGNOR TO IPNEUMATTC SCALE CORPORATION LIMITED, 013 QUINCY, MASSACHUSETTS, A CORPORATION 01! nassncnosn'rrs.

BOX-MAKING MACHINE.

Application filed August 20, 1925. Serial No. 51,397.

To all whom it may concern:

Be it known that I, STANLEY R. HOWARD, a citizen of the United States, residing at East Milton, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Box- Making Machines; and I do hereby declare the following to be a full, clear, and. exact description of the invention, such as will on able others skilled in the art to which it appertains to make and use the same. I I

This invention relates to a box making machine and particularly to a machine for making banded pasteboard boxes.

One object of the invention is to provide a box banding machine ofv novel and improved construction in which provision is made for rendering the banding mechanism inoperative in the event of a jam or abnormal accumulation of boxes at a definite point in the machine. 7

A still further object of the invention is to provide a box banding machine employing a rotary and reciprocatory box holding member and a die cooperating therewith for receiving and conveying partially banded boxes and in which provision is made for stopping the movement of the box holding memher in the event of an accumulation of boxes in the box holding die.

These and other features of the invention will be hereinafter described and particularly' pointed out in the claims.

In the drawings the invention is illustrated as embodied in a machinefor making pasteboard boxes, wherein Figure 1 is a side elevation with portions in section of a sufIicient portion of the machine to enable the invention to be understood; Fig. 2 is an enlarged detail in side elevation of a part of the control mechanism utilized in stopping the machine; Fig. 3 is a rear elevation of a portion of the mechanismshown in Fig. 2; and Fig. 4 is a section on the line 44 of Fig. 3. I

The box making machine illustrated in the drawings comprises in general, and except as hereinafter pointed out, the corn struction of machine illustrated in the U. S. Patent to I-logfeldt No. 996,856, of July 4 1911, and as set forth in said patent the mapresser roll 10 by which an adhesive banding strip 12 is applied to the periphery of a pasteboard or other box, or to a box cover, positioned upon a rotatable plunger 14.

The latter is arranged to be rotated in intermittent cycles, and during each cycle of rotation the banding strip is wrapped completely around the box or cover positioned upon the plunger 14. Thereafter, and before the next cycle of rotation of the plunger 14, provision is made for transferring the box into a reciprocatory die 18, and the remaining operations in folding in thebandmg strip over the edges of the sides of the .chine comprises, in general a banding -or box are completed while the box or cover is 1 held by the die 18. As illustrated in Fig. 1,

the plunger 14 is mounted upon and secured.

to the end of a sleeve journaled in suitable bearings 32 in the machine frame and capable of reciprocation longitudinally. of

the machine frame. Rotation is, imparted to the plunger 14 through the sleeve 30 from a driven pulley 34 through a clutch 36 of any usual or preferred construction provided with a movable member 37 having a pin 38 received within the slotted end89 of a lever 40 connected by a link to the usual shipper lever 44, as shown. When the clutch 36 is thrown in, the rotations of the driven pulley 84 are transmitted to the shaft 51 through the clutch 36 and thence through a pair of cooperatinggears 46, 48 to a counter-shaft 49 having upon the one end thereof an intermittent gear 50 meshing with a pinion 52 upon the sleeve 30. With this arrangement 34 are transmitted through the gearing described to impart intermittent cyclic rotation to the plunger 14 and consequently to the box mounted thereon. The reciprocatory motion is imparted to the plunger 14 by a cam 56 upon a shaft 58 geared to and driven from the driven pulley 34, and having a cam groove 59 in which a cam roller 60 mounted upon a lever 62 rides. The end of the lever 62 is connected to a block 63 upon the sleeve 3()- Provision is also made for holding the box in the die 18 while the plung er 14 is being withdrawn therefrom and for this purpose an ejector plate 67 is mounted on the end of an ejector rod 68 and the latter is extended through the plunger 14 and through the sleeve 30 upon which the plunger is mounted. The ejector plate and rod are yieldingly held in a rearward position with relation to the sleeve 30 by a coil spring 69, see Fig. 1.

previously stated, the die 18 is arranged to reciprocate transversely of the machine, viewing Fig. 1, running in suitable guides 65 and being actuated by suit able mechanism such as is shown and described in said Hogfeldt patent. During the operation of the machine, the banding strip is wrapped around the box orcover on the plunger 14, the latter then moves forward and deposits the box in the die 18. The die 18 is then moved transversely of thema'chine in the manner fully described in said Hogfeldt patent above referred to and after the remaining banding operations have been performed, the banded box removed from the die 18 and the latter re turned into alinement with the plunger 14.

In some instances, however, the completely banded box is not removed from the die so that when-the die returns to a position in alinement with the plunger 14 and the next box is deposited in the die by the plungerl4 as the latter is moved forward by the cam 56 a condition obtains in which there is an accumulation of boxes in the die: 18, such as illustrated in Fig. 1, wherein 70 represents the first box and 72 the "succeeding box. V

The plunger 14 is preferably made yieldingly mounted on the end of the sleeve 30, and as herein shown comprises two parts 71, 73, connected in slidable relation and having springs 75 which are adapted to permit the part 71 to yield when it engages accumulated boxes within the die 18,

thus relieving the strain.

Because of the fact that it is desirable to reciprocate the plunger 14 during a definite stroke from the cam 56', it is desirable in addition to the yieldable construction of plunger 14 that provision be made for throwing out the clutch 36 controlling both the rotation and the reciprocation of the plunger 14 and its sleeve 30, in the event that accumulation of boxes such as 70, 72 takes place within the die. As herein shown, this is accomplished by electrically operated mechanism including a device comprising a casing 82 secured to the end of the shipper lever 44 by a link or rod 85 screwed into one end thereof and fastened by a nut 86. The casing 82 has ex tended therein a second rod 87 connected to the end of the lever 40 controlling the actuation of the clutch 8G, and this rod 87 isyieldably and slidably mounted with tact iiiech'anisin,

lever 44 is thrown to the right in the direction of the arrow, Fig. l, from the -JOSltion therein illustrated, operating to craw the casing to the left, Fig. 1, compressing the coil spring 90,101 in other words elongating the link connection between the end of the shipper-lever 44 and the clutch lever 40. This operates to position a locking member 92 pivoted at one end upon the collar 91, the other end being pivotally connected to the casing by a link-in a substantially horizontal position under the end of a pivoted latch 97 in the form of a bell crank, the second endof the latch be ing'pivoted at 98 to the armature 99- of a solenoid 100 of standard construction The solenoid 100 is connected vin series with the battery 102 and in circuit with suitable coiras will be described, by which a contact is made when a condition in the operation of the machine correspond ing to thatrep'resented in Fig.

forward stroke encounters an accumulation of boxes within the die 18, the rear end of the ejector rod 68.is provided with a contact member 110 adapted to make contact at such time with a contact block 112 inounted'upon one end of a level- 11.4 pivoted upon a stud 115 carried by a bracket 116 secured to the machine frame. 'The contact block 112 is electrically connected by a spring contact 118, the end of which is upti'iriied: slightly and rides upon a stationary contact 119 or terminal member, connected by the lead 120to one side of a timing contact coiiiprisi i ig two spring provided with contact points bers 121, 122

7 l obtains. In order to close the circuit to actuate 123, 124 arranged to be brought into con tact by a positively driven cam 125 engaging a cam roller 126 on the endof an arm 12'? having an insulating piece 128 which engages the lowerspring 12-2 to raise it to bring the point 124 into engagement with the point 123 upon the stationary con tact, when the highpoint of cam passes under the cam roller 126 as illustrated in Fig. 3. 'The cam 125 is so timed as to close the contact at this point when the plunger 114 has reached the end of its forward travel. Ordinarily under the normal operation of parts in which there is only a single thickness of box present in the. die

18 the contact blocks 110, 1 12 will at this time have become separated, the upper contact 110 being at its extreme position to the left, viewing Fig. 4, corresponding to the forward position of the plunger. When, therefore, the timing contacts. 123, 124 close the circuit under the influence of the positively timed cam 125, the circuit is still open between the contact blocks 110, 112, so that the solenoid 100 of the clutch actuating mechanism is not actuated or energized. When, however, in its forward movement the ejector plate 67 and the plunger 14 meet an accunmlation of boxes, both the plunger and the ejector yield, compressing the springs -75 and (39 and causing the contact blocks 110, 112 to remain in contact in the position illustrated in Fig. 4, so that when the contact is subsequently made between the timing contacts 123, 124 a definite circuit is established through the machine frame, through the solenoid 100, through the timing contacts 123, 124, through the contact blocks 11 112 to the machine frame, thus energizing the solenoid, releasing the latch 97 and allowing the coil spring 90 to expand, thrusting the link or rod 87 to the left relative to the casing 82, consequently operating to throw out the clutch 36 and stop the machine.

During the normal operation ofthe ma chine in which the banded box is removed from the die 18 at near the end of each cycle of operation of the machine, the circuit just described will be opened at the timing contacts 123, 124 before the plunger 14 has reached a point in its rearward movement such that the contact blocks 110, 112 are brought into contact to close the circuit, so that at such time the solenoid 100 is not energized.

During the normal operation of the machine when there is no accumulation of boxes in the die 18, the ejector plate 67 and ejector rod 68 occupy an extreme position to the left, viewing Fig. -1, at the forward stroke of the cam 56, permitting at this time a latch 130 on a bell crank 132 pivoted at 115, to be snapped upwardly by a spring 134 into a position in back of a second block 136 011 the rear end of the ejector rod 68. Then, as the plunger is moved rearwardly, the coil spring 69 compresses and the ejector plate 67 is held by the latch 130 operating to hold the box in the die 18. When the rise 138 on the face of the cam 125 engages the roll 139 on the second arm of the bell crank 132, the latch 130 is disengaged, permitting the coil spring 69 to cause the ejector rod 68 and the ejector plate 67 to be rapidly moved rearwardly. When, however, the condition illustrated in Fig. 1 ob-,

tains, namely when there is an extra thickness of box in the die 18, the latch 130 is,

prevented from snapping in behind the block 136, as will be apparent froman inspection of Fig. 1. r

1 While the preferred form of the invention has been illustrated and described, it is to be understood that the invention may be embodied in other forms Within the scope of the following claims.

Having thus described the I invention, what is claimed is:

1. In a box making machine, in combination, box banding mechanism including a rotatable and reciprocatory box holding device, a die into which a box is delivered or is introduced by said device upon recipr0cation thereof, and means operative when an abnormal accumulation of boxes takes place within the die for preventing reciprocation of said box holding device.

2. In a box making machine, in combination, box banding mechanism, including a rotatable box holder, means for rotating the box holder, a presser for pressing a banding strip against the box or cover held by the box holder, and means operative when an abnormal accumulation of boxes occurs at a definite point in. the machine for rendering the box banding mechanism inoperative.

3. In a box making machine, in combination, box banding mechanism including a rotatable and reciprocatory box holding de vice, a presser cooperating therewith for pressing a banding strip against a box held by said device, a member cooperating with said box holding device to receive the box deposited therein by said device upon its reciprocatory movement, and means for stopping the movement of the box holding device when a plurality of boxes accumulate in said member.

4. In a box making machine, in combination, a movable die, a rotatable and reciprocatorybox holding member adapted to de-' posit a banded box in said die, and means for stopping the rotatable and reciprocatory movement of said box holding member when an accumulation of boxes takes place in said die.

5. In a box making machine, in combination, box banding mechanism including a box holder, a presser member for applying a banding strip to a box held by said box holding device, a die, means for reciprocating the box holding 'device to deposit a box in said die, and means for controlling the reciprocation and rotary movement of the box holder in accordance with the extent of movement thereof into the said die.

6. In a box making machine, in combination, box banding mechanism including a box holding device, a die into which the box holding device movesto deposit a box in the die, and means for reciprocating the box.

gages an abnormal accumulation of boxes Within the die.

7. In a box making machine, in combination, box banding mechanism including a box holding device, a die into which the box holding device moves to deposit a box in the dic and means for reciprocating the box holding device including a cam, said device comprising two parts yieldably connected together. I 10 lntestimony whereof I'have signed my name to this specification.

STANLEY R. HOWARD. 

